Note 6 - Leases (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Lease, Cost	$ 34,000	$ 23,000
Operating Lease, Lease Income	27,000	34,000
Other Assets [Member]
Lessor, Cost, Contracts Asset	4,000		$ 4,000
General and Administrative Expense [Member]
Lease, Cost	$ 33,000	$ 22,000